Internal gear pump with improved communication between inlet and idler and between inlet and rotor
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United States of America Patent
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Jun 20, 2017
Grant Date -
Oct 13, 2016
app pub date -
Apr 8, 2015
filing date -
Apr 8, 2015
priority date (Note) -
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Abstract
This document discloses an internal gear pump with a symmetrical casing and a head design that enables high pumping speeds, reduced turbulence and reduced risk or occurrence of cavitation. The head includes a boss that extends into the pump chamber to form an idler support and a crescent support. The crescent support includes a liquid directing step that extends from the crescent arcuately towards the inlet. The liquid directing step divides liquid incoming from the inlet into a portion directed to an idler feed slot and another portion directed to a rotor feed slot. The idler feed slot provides communication between the inlet and the roots of the idler and the rotor feed slot provides communication between the inlet and spaces between the rotor teeth.
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